Waterproof coating prepared from red mud and preparation method thereof

Abstract

The invention provides a waterproof coating prepared from red mud and a preparation method of the waterproof coating. Every 1000 parts by mass of the waterproof coating is prepared from 300-350 parts by mass of pure acrylic emulsion, 150-200 parts by mass of butyronitrile latex, 40-60 parts by mass of halloysite, 40-60 parts by mass of titanium dioxide, 100-150 parts by mass of ground red mud, 100-150 parts by mass of heavy calcium carbonate powder, 2-3 parts by mass of cellulose ether, 4-6 parts by mass of a dispersing agent, 1-3 parts by mass of a wetting agent, 3-5 parts by mass of a defoaming agent, 2-4 parts by mass of a preservative, 6-8 parts by mass of iron oxide red powder, 0.5-1.5 parts by mass of organic color paste and the balance of water. The waste red mud can be used for preparing the waterproof coating, the environment-friendly effect is achieved, the production cost is low, and the prepared waterproof coating is good in waterproof effect, strength, adhesive strength, crack resistance and weather resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of building waterproofing, and particularly relates to a waterproof coating prepared from red mud and a preparation method thereof. Background Art

[0002] Red mud is a waste generated in the industrial production of extracting alumina from bauxite. Due to its high iron oxide content and appearance similar to red soil, it is called red mud. Due to factors such as a large amount of red mud produced by the aluminum industry, great environmental pressure, and difficulty in directly consuming existing solutions, therefore, exploring a technical route that can consume red mud on a large scale, is green and environmentally friendly, and efficient will have great practical significance. With the acceleration of the process of urban modernization construction in China, special coatings used in roofing and water tanks and other parts are being widely concerned due to their irreplaceable advantages. Therefore, specially designing a waterproof coating using the waste red mud produced by the aluminum industry is a solution that not only meets the market development needs but also solves the problem of recycling some solid waste. Summary of the Invention

[0003] The purpose of the present invention is to provide a waterproof coating prepared from red mud and a preparation method thereof, which can use waste red mud to prepare a waterproof coating, is more environmentally friendly, has a low production cost, and the prepared waterproof coating has good waterproof, strength, adhesion, crack resistance, and weather resistance effects.

[0004] To achieve this purpose, the present invention adopts the following technical solutions: The present invention provides a waterproof coating prepared from red mud. By mass, every 1000 parts by mass of the waterproof coating includes: 300 - 350 parts of pure acrylic emulsion, 150 - 200 parts of nitrile latex, 40 - 60 parts of halloysite, 40 - 60 parts of titanium dioxide, 100 - 150 parts of ground red mud, 100 - 150 parts of heavy calcium powder, 2 - 3 parts of cellulose ether, 4 - 6 parts of dispersant, 1 - 3 parts of wetting agent, 3 - 5 parts of defoamer, 2 - 4 parts of preservative, 6 - 8 parts of iron red powder, 0.5 - 1.5 parts of organic color paste, and the balance of water.

[0005] As a preferred scheme of the waterproof coating prepared from red mud, the particle size of the halloysite is 100nm - 300nm.

[0006] As a preferred scheme of the waterproof coating prepared from red mud, the fineness of the ground red mud is 325 mesh.

[0007] As a preferred scheme of the waterproof coating prepared from red mud, the fineness of the heavy calcium powder is 1200 mesh.

[0008] As a preferred scheme of the waterproof coating prepared from red mud, the cellulose ether is hydroxyethyl cellulose ether 250HBR.

[0009] As a preferred embodiment of the waterproof coating prepared using red mud, the dispersant is dispersant 5040, the wetting agent is wetting agent LCN407, the defoaming agent is defoaming agent 6800, and the preservative is Kathon preservative.

[0010] As a preferred embodiment of the waterproof coating prepared using red mud, the iron red powder is iron oxide red of 400 mesh.

[0011] The present invention also provides a preparation method of the waterproof coating prepared using red mud as described in any one of the above, comprising the following steps: Use an ultrasonic mixing device to perform ultrasonic premixing of halloysite, ground red mud, heavy calcium powder, and cellulose ether for 100 min to prepare a masterbatch; After pouring out the masterbatch, add styrene-acrylic emulsion, nitrile latex, wetting agent, defoaming agent, and dispersant and stir and mix for 5 min, then slowly add the masterbatch, titanium dioxide, iron red powder, and organic color paste while stirring, and finally add water and preservative and stir thoroughly for 20 min to prepare the waterproof coating.

[0012] Advantages of the present invention: (1) Using ultrafine halloysite improves weather resistance, and in combination with components such as pure acrylic emulsion, ground red mud, iron red powder, and organic color paste, achieves excellent weather resistance and color fixation effects; (2) Incorporating nitrile latex improves the crack resistance of the material itself; (3) The incorporation of halloysite improves the flame retardant effect of the material, has a certain flame retardant effect, and is particularly suitable for roof, pool, and exterior wall waterproof coatings; (4) Using a compound of pure acrylic emulsion and nitrile latex improves the adhesion of the coating, and using the ultrasonic premixing method, mixes materials with different particle size gradients evenly, improves the density, and also improves the material strength; (5) Adopting the ultrasonic premixing method not only improves the mixing uniformity but also reduces the mixing and stirring time, shortens the production time, and improves the production efficiency.

[0013] In summary, the present invention can prepare a waterproof coating using waste red mud, which is more environmentally friendly, has a low production cost, and the prepared waterproof coating has good waterproof, strength, adhesion, crack resistance, and weather resistance effects. Specific embodiments

[0014] The following describes the embodiments of the present disclosure in detail.

[0015] The following describes the embodiments of the present disclosure through specific examples. Those skilled in the art can easily understand the other advantages and effects of the present disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be combined arbitrarily to form new embodiments. For those embodiments where specific conditions are not indicated, they are carried out according to conventional conditions or conditions recommended by the manufacturer. For reagents or instruments where the manufacturer is not indicated, they are all conventional products that can be obtained through commercial purchase. The reagents used in the examples can be conventionally purchased from the market unless otherwise specified. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts belong to the scope of protection of the present disclosure.

[0016] Example 1 Weigh 1 t of waterproof coating raw materials according to the following component masses, including: Pure acrylic emulsion: 325 kg Nitrile latex: 175 kg Halloysite (particle size 100 nm - 300 nm): 50 kg Titanium dioxide: 50 kg Ground red mud (325 mesh): 125 kg Heavy calcium powder (1200 mesh): 125 kg HEC cellulose ether (250HBR): 2.5 kg Dispersant 5040: 5 kg Wetting agent LCN407: 2 kg Defoamer 6800: 4 kg Kathon preservative: 3 kg Iron red powder (400 mesh, iron oxide red): 7 kg Organic color paste red R2-SK: 1 kg Water: the balance Prepare the waterproof coating according to the following steps: Use an ultrasonic mixing device to perform ultrasonic premixing on halloysite, ground red mud, heavy calcium powder, and cellulose ether for 100 min to prepare the masterbatch; After pouring out the masterbatch, add styrene-acrylic emulsion, nitrile latex, wetting agent, defoamer, and dispersant and stir and mix for 5 min. Then, while stirring, slowly add the masterbatch, titanium dioxide, iron red powder, and organic color paste. Finally, add water and preservative and stir well for 20 min to prepare the waterproof coating.

[0017] Example 2 Weigh 1 t of waterproof coating raw materials according to the following component masses, including: Pure acrylic emulsion: 300 kg Nitrile latex: 150 kg Halloysite (particle size 100 nm - 300 nm): 40 kg Titanium dioxide: 40 kg Ground red mud (325 mesh): 150 kg Heavy calcium powder (1200 mesh): 150 kg HEC cellulose ether (250HBR): 3 kg Dispersant 5040: 6 kg Wetting agent LCN407: 3 kg Defoamer 6800: 5 kg Kathon preservative: 4 kg Iron red powder (400 mesh, iron oxide red): 8 kg Organic color paste red R2 - SK: 1.5 kg Water: the balance Prepare the waterproof coating according to the following steps: Use an ultrasonic mixing device to ultrasonically premix halloysite, ground red mud, heavy calcium powder, and cellulose ether for 100 min to prepare the masterbatch; After pouring out the masterbatch, add styrene - acrylic emulsion, nitrile latex, wetting agent, defoamer, and dispersant and stir - mix for 5 min. Then, while stirring, slowly add the masterbatch, titanium dioxide, iron red powder, and organic color paste. Finally, add water and preservative and stir well for 20 min to prepare the waterproof coating.

[0018] Example 3 Weigh 1 t of waterproof coating raw materials according to the following component masses, including: Pure acrylic emulsion: 350 kg Nitrile latex: 200 kg Halloysite (particle size 100 nm - 300 nm): 60 kg Titanium dioxide: 60 kg Ground red mud (325 mesh): 100 kg Heavy calcium powder (1200 mesh): 100 kg HEC cellulose ether (250HBR): 2 kg Dispersant 5040: 4 kg Wetting agent LCN407: 1 kg Defoamer 6800: 3 kg Kathon preservative: 2 kg Iron red powder (400 mesh, iron oxide red): 6 kg Organic Color Paste Red R2-SK 0.5kg Water balance Prepare the waterproof coating according to the following steps: Use an ultrasonic mixing device to perform ultrasonic premixing of halloysite, ground red mud, heavy calcium powder, and cellulose ether for 100 min to prepare the masterbatch; After pouring out the masterbatch, add styrene-acrylic emulsion, nitrile latex, wetting agent, defoaming agent, and dispersant and stir and mix for 5 min. Then, while stirring, slowly add the masterbatch, titanium dioxide, iron red powder, and organic color paste. Finally, add water and preservative and stir well for 20 min to prepare the waterproof coating.

[0019] Performance Test Use the method of type T E in JC / T 864-2008 "Polymer Emulsion Building Waterproof Coating" to detect indicators such as tensile strength, elongation at break, bond strength, water impermeability, and impermeability.

[0020] The test results are shown in Table 1 below Table 1 Performance Indicators and Their Comparisons From the above results, it can be seen that the waterproof coating prepared by the present invention has very ideal effects in terms of waterproofing, strength, adhesion, crack resistance, weather resistance, etc.

[0021] The above is only to illustrate the implementation manner of the present invention and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent replacements, improvements, etc. made without creative labor within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A waterproof coating prepared using red mud, characterized in that: Measured by mass, every 1000 parts of the waterproof coating includes: 300-350 parts of pure acrylic emulsion, 150-200 parts of nitrile latex, 40-60 parts of halloysite, 40-60 parts of titanium dioxide, 100-150 parts of ground red mud, 100-150 parts of heavy calcium powder, 2-3 parts of cellulose ether, 4-6 parts of dispersant, 1-3 parts of wetting agent, 3-5 parts of defoaming agent, 2-4 parts of preservative, 6-8 parts of iron red powder, 0.5-1.5 parts of organic color paste and the balance of water.

2. The waterproof coating prepared using red mud according to claim 1, characterized in that: The particle size of the halloysite is 100nm to 300nm.

3. The waterproof coating prepared using red mud according to claim 1, characterized in that: The fineness of the ground red mud is 325 meshes.

4. The waterproof coating prepared using red mud according to claim 1, characterized in that: The fineness of the heavy calcium powder is 1200 meshes.

5. The waterproof coating prepared using red mud according to claim 1, characterized in that: The cellulose ether is hydroxyethyl cellulose ether 250HBR.

6. The waterproof coating prepared using red mud according to claim 1, characterized in that: The dispersant is dispersant 5040, the wetting agent is wetting agent LCN407, the defoaming agent is defoaming agent 6800, and the preservative is Kathon preservative.

7. The waterproof coating prepared using red mud according to claim 1, characterized in that: The iron red powder is 400 mesh iron oxide red, and the organic color paste is red R2-SK.

8. A method for preparing a waterproof coating using red mud according to any one of claims 1 to 7, characterized in that: The following steps are involved: Halloysite, ground red mud, heavy calcium powder and cellulose ether were ultrasonically premixed for 100 minutes using an ultrasonic mixing device to prepare a masterbatch; After pouring out the masterbatch, add styrene acrylic emulsion, nitrile latex, wetting agent, defoaming agent and dispersant and stir and mix for 5 minutes, then slowly add the masterbatch, titanium dioxide, iron red powder and organic color paste while stirring, finally add water and preservative, stir thoroughly for 20 minutes to prepare the waterproof coating.

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